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Question

Arc Ultra Resets to Factory Settings

  • December 28, 2025
  • 4 replies
  • 0 views

Last month I updated from an old Playbase to a new Arc Ultra. In my area we have unexpectedly had three power outages in the last month. After each outage when the power is restored the Arc Ultra has a blinking green or white light, and I have had to reset the bar from the factory settings all over again - three times. I have the power cord plugged into a surge suppressor. Is this normal behavior? There is no settings memory on this product?

4 replies

Mr. T
  • December 28, 2025

The white flashing led indicates the Arc Ultra is waiting to connect to your router/network, which may take a little time as your router also recovers from the power outage, which is to be expected.

I have never experienced a flashing green led after a power outage on any Sonos device, unless I was intentionally following the factory reset process. Next time this happens, submit a diagnostic and contact Sonos Support. The diagnostic may contain data to explain why it gets into that state.


Airgetlam
  • December 28, 2025

I lose power rather regularly, living on an island, but neither of my two Arcs have ever factory reset. In fact, once the router comes back up, they reconnect, and act like nothing has even occurred. 
 

I’d certainly concur with ​@Mr. T ‘s assessment, and encourage the submission of  a system diagnostic within 10 minutes of experiencing this problem, and a call Sonos Support to discuss it.


  • Author
  • Contributor I
  • December 28, 2025

The white flashing led indicates the Arc Ultra is waiting to connect to your router/network, which may take a little time as your router also recovers from the power outage, which is to be expected.

I have never experienced a flashing green led after a power outage on any Sonos device, unless I was intentionally following the factory reset process. Next time this happens, submit a diagnostic and contact Sonos Support. The diagnostic may contain data to explain why it gets into that state.

Many thanks for the reply.


  • Author
  • Contributor I
  • December 28, 2025

I lose power rather regularly, living on an island, but neither of my two Arcs have ever factory reset. In fact, once the router comes back up, they reconnect, and act like nothing has even occurred. 
 

I’d certainly concur with ​@Mr. T ‘s assessment, and encourage the submission of  a system diagnostic within 10 minutes of experiencing this problem, and a call Sonos Support to discuss it.

 

Many thanks. Will submit.